Seiko Presage SSA425 Open Heart vs Seiko Prospex "Turtle"
Seiko's timepiece meets Seiko's diver
Quick Verdict
The Seiko Presage SSA425 Open Heart (~$460) offers Seiko In-House Automatic precision at $40 less than the Seiko Prospex "Turtle" (~$500). The Prospex "Turtle" counters with Made in Japan craftsmanship and 200m (20 ATM) Diver water resistance. Both are exceptional watches for their respective price points.
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Specifications Compared
| Feature | Seiko Presage SSA425 Open Heart | Seiko Prospex "Turtle" |
|---|---|---|
| Price | ~$460 | ~$500 |
| Case Size | 40.5mm | 45mm |
| Movement | Automatic Caliber 4R38 | Automatic Caliber 4R36 |
| Caliber Type | Seiko In-House Automatic | In-House Automatic Manufacture |
| Power Reserve | 41 Hours | 41 Hours |
| Water Resistance | 50m (5 ATM) | 200m (20 ATM) Diver |
| Crystal | Hardlex Crystal | Sapphire Crystal |
| Case Material | Stainless Steel | Stainless Steel |
| Origin | Made in Japan | Made in Japan |
Category-by-Category Analysis
Design & Aesthetics
Seiko's design language vs Seiko's approach
Movement & Performance
Automatic Caliber 4R38 vs Automatic Caliber 4R36
Wearability & Fit
40.5mm vs 45mm — different wrist presence
Value & Cost of Ownership
Seiko is $40 more affordable
Water Resistance
50m (5 ATM) vs 200m (20 ATM) Diver
Our Verdict
Seiko
Presage SSA425 Open Heart
Choose the Seiko Presage SSA425 Open Heart if you prioritize Seiko In-House Automatic engineering, Made in Japan craftsmanship, and 50m (5 ATM) water resistance. At ~$460, it delivers Automatic Caliber 4R38 with 41 Hours power reserve.
Check Price on AmazonSeiko
Prospex "Turtle"
Choose the Seiko Prospex "Turtle" if you value In-House Automatic Manufacture technology, Made in Japan heritage, and 45mm proportions. At ~$500, the Automatic Caliber 4R36 with 41 Hours power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Seiko Presage SSA425 Open Heart and Seiko Prospex "Turtle" represent two distinct approaches to fine watchmaking — the Seiko bringing Made in Japan tradition while Seiko delivers Made in Japan engineering.
Frequently Asked Questions
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